This collection of notes provides an overview of acute lung inflammation, covering its underlying mechanisms, diverse causes both infective and non-infective, and resulting symptoms. It outlines the complex inflammatory cascade, the roles of various cells and mediators, and potential outcomes including resolution, scarring, and chronic inflammation. Specific conditions such as bronchitis, bronchiolitis, pneumonia, and ARDS are discussed, detailing their clinical presentations, diagnostic approaches, and treatment strategies. Scattered amongst these medical insights are humorous, philosophical thoughts offering a brief respite from the technical information.